new security regulations for people flying into the united states. it stems from that attempted bombing of a flight on christmas day. over the weekend, president obama linked that plot to al- qaeda. new rules took effect at midnight. they are already getting mixed reaction, come after a late night security breach. >> reporter: starting today, all travelers that want to get into the u.s. have to play by tough security rules. people flying from nations considered to be sponsors of terrorism or other countries of interest see the biggest changes. mandatory full body pat downs, carry on searches and body scans are part of the latest wave of enhanced procedures. at least 14 countries on the list, nearly all muslim. philadelphia residents went through ramped up measures on flights from belgium but weren't impressed. >> they looked through the bag, they missed one bag. so sort of felt very artificial. >> reporter: new guidelines more than a week after a man allegedly tried to blow up a plane christmas day. airports around the world have been on alert ever s